Meaning of ferrotype in English:

ferrotype

Pronunciation /ˈfɛrətʌɪp/

noun

historical
  • 1A photographic process using iron compounds as developing agents; = energiatype .

    rare after mid 19th century.

  • 2A photograph taken using a process by which negatives are taken directly on black-enamelled or painted thin iron plates covered with photographic emulsion, the dark background giving the appearance of a positive image.

  • 3In full "ferrotype plate". A thin iron plate used in this process.

    Ferrotype plates were also adapted for use as a diaphragm in the mouthpiece and earpiece of a telephone.

Origin

Mid 19th century. From ferro- + -type.